1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olga nikolaevna [1]
3 years ago
15

Kim took 5 hours to complete a journey with an average speed of 80 km/h. For the first 3 hours, she travelled at an average spee

d of 60km/h. What was her average speed for the remaining time of the journey ?
Physics
1 answer:
jarptica [38.1K]3 years ago
5 0

Answer:110

Explanation:

You might be interested in
This type of reaction is most like breaking a rack of balls at the start of a game of pool:
Svet_ta [14]
The answer is b fission hope this helps

5 0
3 years ago
1) Subatomic particles called muons can be created in the upper atmosphere by collisions of cosmic rays (energetic particles com
Vsevolod [243]

Answer and explanation:

A.

Muon travelled straight down towards the earth. Therefore the tree moves up in the rest frame of muon (option a)

B.

In muon rest frame it travels Zero meters

C.

Distance, d = Velocity, v * Time, s

where, v = 0.9c = 0.9 \times 8 \times 10^8 , s = 2.2 \mu s

d = 0.9 \times 3 \times 10^8 \times 2.2 \times 10^{-6}\\\\d = 594m

D.

Distance from the top of the mountain to the tree is the same as the distance travelled by the tree in the muons rest frame

that is same as in part C which is 594m

E.

Using lorentz contraction

In the rest frame of someone standing on the mountain

the distance is given by

d' = \frac{d}{\gamma} = d\sqrt{1 - \frac{v^2}{c^2}}, where, \frac{1}{\gamma}= \sqrt{1 - \frac{v^2}{c^2}}

d' = 594\sqrt{1 - \frac{(0.9c)^2}{c^2}}

d' = 594\sqrt{1 - 0.81}

d' = 594 \times 0.4359

d' = 258.92m

F.

in the rest frame of someone standing on the mountain,

muon moves straight down

3 0
4 years ago
What did Alfred wegener notice about the outlines of the continents
AnnZ [28]
He noticed that the outlines of the continents looked like they could fit together similar to puzzle pieces
<span />
5 0
4 years ago
Mechanical advantage of a machine can be increased by designing it for:
Tems11 [23]

Answer:(4).

Explanation:

8 0
3 years ago
I need help with 2 questions . Please help c:
dezoksy [38]
A) According to the nebular theory, the Solar System formed from a huge gaseous nebula which at a certain point was perturbated. Atoms and molecules started colliding, forming planetesimals (a sort of big rocks). The planetesimals were attracted to each other by gravity, forming bigger warm almost spherical objects called protoplanets, which at the end cooled down forming planets.
Therefore the correct answer is "all of the above".

b) The planets closer to the Sun were (and still are) subject to higher temperatures, due to their close distance to the Sun. In these conditions, rocky materials undergo condensation, while iced gaseous materials undergo vaporization. In the outer parts of the Solar System temperatures are too low to allow these transformations.
The correct answer is again "all of the above".
8 0
3 years ago
Other questions:
  • Hrissie drinks cola every day. She texts the codes printed on the bottle caps to a reward center. For every 40 codes she texts,
    12·2 answers
  • The ability to react with air is what
    12·2 answers
  • On the interstate, the speed limit is 60 mi/h (about 100 km/h) a skilled driver can safely decelerate at about 6.1m/s^2. How lon
    13·1 answer
  • Your body temperature begins to rise during strenuous exercise in hot weather. Specialized nerve cells on the skin detect an inc
    14·1 answer
  • The buoyant force that acts on a floating 2000-N atmospheric science balloon is _______.
    10·1 answer
  • Place the balloon in a bell jar. If available also add some shaving cream and fresh marshmallows. Ask the instructor for help if
    6·1 answer
  • a metal of work function 1.8eV is illuminated by light of wavelength 3.0x*10-7,calculate the maximum kinetic energy
    15·1 answer
  • What do you think a divergent (constructive) boundary is? How do plates interact with each other?
    8·1 answer
  • An object is 9.00 cm tall. The image is 5.76 cm tall, and 14 cm
    5·1 answer
  • Which type of scanner uses X-rays, and why?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!